JP3219625U - Anti-vibration spring and vibration damping device - Google Patents

Abstract

An anti-vibration spring for absorbing vibrations and shocks, including a shock-absorbing member with uniform characteristics and excellent design characteristics.
A coil spring 11 is formed by winding a wire in a spiral shape, and a tubular cushioning member 12 formed in a tubular shape with a rubber material. The coil spring 11 is inserted into the tubular cushioning member 12. By using the anti-vibration spring 1 in which the tubular buffer member 12 and the coil spring 11 are fixed, the characteristics in the circumferential direction are made uniform, and the design as an anti-vibration spring is improved.
[Selection] Figure 1

Description

  The present invention relates to a vibration damping spring and a vibration damping device including the vibration damping spring.

For example, when a precision machine is transported, a vibration damping device including an anti-vibration spring is used to absorb vibrations and shocks associated with transportation.
Patent Documents 1 and 2 disclose conventional techniques related to such a vibration-proof spring and a vibration damping device including the vibration-proof spring.

Japanese Patent No. 4948763 Japanese Patent No. 6355986

Patent Documents 1 and 2 describe a damping coil spring (anti-vibration spring) in which a viscoelastic sheet is wound around and crimped to the outer periphery of the coil spring.
Since the anti-vibration springs described in Patent Documents 1 and 2 are formed by winding a viscoelastic sheet around the outer periphery of the coil spring, a seam is generated in the viscoelastic sheet. In the joint portion of the sheet, discontinuity occurs in the viscoelastic sheet. In the discontinuous portion, the characteristics (such as buffering capacity) are also discontinuous and not preferable in terms of design. In addition, a manufacturing apparatus for winding the viscoelastic sheet around the outer periphery of the coil spring and crimping it is also required.

  In view of the above points, the present invention aims to provide a vibration-proof spring for absorbing vibrations and shocks, including a shock-absorbing member having uniform characteristics and an excellent design. And

(Configuration 1)
A coil spring formed by spirally winding an element wire, and a tubular buffer member formed in a tubular shape by a rubber material, and the coil spring is inserted into the tubular buffer member, and the tubular buffer An anti-vibration spring in which the inner peripheral surface of the member and the outer peripheral surface of the coil spring are in close contact.

(Configuration 2)
The anti-vibration spring according to Configuration 1, wherein the tubular buffer member and the coil spring are fixed to each other.

(Configuration 3)
The spiral axis of the coil spring is defined as the vertical direction, and the shape of the outer peripheral side of the strand in a side view seen from the direction orthogonal to the axis is a component in which the upward tangent vector in the vicinity of the upper end is directed outward. The anti-vibration spring according to Configuration 1 or 2, wherein the anti-vibration spring has a shape in which a downward tangent vector near the lower end has an outward component.

(Configuration 4)
A component in which an upward tangent vector in the vicinity of the upper end of the shape of the outer periphery of the element wire in the side view as viewed from a direction perpendicular to the axis is a spiral axis of the coil spring. And a connecting member for forming a shape in which a downward tangent vector in the vicinity of the lower end has an outward component,
The anti-vibration spring according to Configuration 1 or 2, wherein the tubular buffer member and the coil spring are in close contact with or fixed to each other via the connection member.

(Configuration 5)
A vibration damping device comprising the vibration-proof spring according to any one of configurations 1 to 4.

  According to the vibration-proof spring of the present invention and the vibration damping device including the same, since the shock-absorbing member is formed by a tubular shock-absorbing member formed in a tubular shape with a rubber material, there is no discontinuous portion such as a seam in the circumferential direction. Therefore, the characteristics are uniform and the design is excellent.

The figure which shows the vibration-proof spring of Embodiment 1 (the side view which notched some) Sectional drawing which shows the vibration-proof spring of Embodiment 1. Sectional drawing which shows the vibration-proof spring (part) of Embodiment 2 Sectional drawing which expanded a part of vibration-proof spring of Embodiment 2

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In addition, the following embodiment is one form at the time of actualizing this invention, Comprising: This invention is not limited within the range.

<Embodiment 1>
FIG. 1 is a view showing the vibration-proof spring 1 of this embodiment, and is a side view in which a part of a tubular buffer member 12 is cut away. 1A shows a state where no load is applied, and FIG. 1B shows a state where the load is applied and the spring is contracted. FIG. 2 is a cross-sectional view of the vibration-proof spring 1.

The anti-vibration spring 1 includes a coil spring 11 formed by winding a wire in a spiral shape, and a tubular cushioning member 12 formed in a tubular shape from a rubber material.
In the present embodiment, the coil spring 11 is formed of a wire having a trapezoidal cross section. As can be understood from FIGS. 1 and 2, the bottom of the trapezoid is configured to be the outer periphery of the coil spring.
The tubular buffer member 12 is a member formed in a tubular shape (hollow tube) with a rubber material.

The anti-vibration spring 1 is formed by inserting a coil spring 11 into a tubular shock-absorbing member 12 and fixing an inner peripheral surface of the tubular shock-absorbing member 12 and an outer peripheral surface (a trapezoidal bottom portion) of the coil spring 11. Yes.
The inner peripheral surface of the tubular buffer member 12 and the outer peripheral surface of the coil spring 11 (trapezoidal bottom portion) are fixed after applying an adhesive to the inner peripheral surface of the tubular buffer member 12 or the outer peripheral surface of the coil spring 11. This is done by inserting the coil spring 11 into the buffer member 12.

The anti-vibration spring 1 can efficiently attenuate the vibration of the spring by having the above-described configuration. That is, since the tubular buffer member 12 made of a rubber material is provided so as to cover the outer periphery of the coil spring 11, the tubular buffer member 12 is deformed when the coil spring 11 vibrates or expands and contracts. The energy is absorbed by the deformation of the tubular buffer member 12, and the vibration of the spring is efficiently damped.
Therefore, the anti-vibration spring 1 can be effectively used for a vibration damping device or the like that protects the precision machine and the like by absorbing vibrations and shocks accompanying the transportation when the precision machine or the like is transported.

According to the anti-vibration spring 1 of the present embodiment, since the buffer member is formed by the tubular buffer member 12 formed in a tubular shape with a rubber material, there is no discontinuous portion such as a seam in the circumferential direction. The characteristics are uniform and the design is excellent.
In addition, since the tubular buffer member 12 can use an existing manufacturing machine as a rubber pipe, as in Patent Documents 1 and 2, a special manufacturing method for winding and crimping a viscoelastic sheet around the outer periphery of a coil spring. It is also excellent in that no equipment is required.

In the present embodiment, the inner peripheral surface of the tubular cushioning member 12 and the outer peripheral surface of the coil spring 11 are fixed by an adhesive, but the fixing method is not limited to the adhesive and may be any method. (For example, heat sealing).
In the present embodiment, the inner peripheral surface of the tubular buffer member 12 and the outer peripheral surface of the coil spring 11 are fixed as examples. However, the fixing is not an essential requirement. The inner peripheral surface of the coil spring 11 and the outer peripheral surface of the coil spring 11 may be in close contact with each other. By virtue of the fact that the inner peripheral surface of the tubular buffer member 12 and the outer peripheral surface of the coil spring 11 are in close contact, the inner peripheral surface of the tubular buffer member 12 and the outer peripheral surface of the coil spring 11 when the coil spring 11 vibrates or expands and contracts. Friction force is generated between the two, energy is absorbed by the friction force, and the vibration of the spring is effectively damped.

In the present embodiment, the coil spring 11 is an example in which the cross section is formed of a trapezoidal element wire. However, the present invention is not limited to this, and any coil spring can be made of “rubber material”. A tubular buffer member formed in a tubular shape can be applied. For example, a “tubular cushioning member formed in a tubular shape with a rubber material” may be applied to a coil spring formed of a round wire, but in this case, FIG. As shown in Fig. 2, when the spring is contracted, the buffer member (viscoelastic sheet) tends to be caught between the strands.
In a second embodiment below, a description will be given of an anti-vibration spring in which the buffer member is prevented from getting caught between the strands.

<Embodiment 2>
FIG. 3 is a cross-sectional view illustrating a part of the vibration-proof spring according to the second embodiment. FIG. 4 is a cross-sectional view illustrating a part of the vibration-proof spring according to the second embodiment in an enlarged manner. 3 and 4 correspond to “a side view as viewed from a direction perpendicular to the axis of the spiral axis of the coil spring as a vertical direction”.

The anti-vibration spring 1 ′ of the present embodiment includes a coil spring 11 ′ formed by winding a wire in a spiral shape, and a tubular buffer member 12 formed in a tubular shape with a rubber material, and the coil spring 11 ′. And the tubular buffer member 12 are fixed (bonded to each other with an adhesive) via the connecting member 13.
The coil spring 11 ′ is formed by a round wire (a wire having a circular cross section). The tubular buffer member 12 is the same as that of the first embodiment.

The connecting member 13 is the outer peripheral side of the wire of the coil spring 11 ′ in “a side view as viewed from the direction perpendicular to the axis of the spiral shape of the coil spring (ie, FIGS. 3 and 4)”. Is a member that has an upward tangent vector in the vicinity of its upper end having an outward component and a downward tangent vector in the vicinity of its lower end having an outward component.
That is, as shown in FIG. 4, the connecting member 13 is fixed to the outer peripheral side of the coil spring 11 ′, and the outer peripheral side shape of the coil spring 11 ′ is a component in which “an upward tangent vector near the upper end is directed outward. , And the tangent vector in the downward direction near the lower end is converted into a shape having an outward component.

The connection member 13 in the present embodiment is a spiral member that is mounted on the outer peripheral side over substantially the entire length (excluding the end winding portion) of the coil spring 11 ′.
As shown in FIGS. 3 and 4, the connecting member 13 has an arc-shaped depression on the inner peripheral side corresponding to the outer periphery of the coil spring 11 ′, and an arc-shaped recess opposite to this on the outer peripheral side. Has a dimple. The arc-shaped depression on the outer peripheral side constitutes “a shape in which an upward tangent vector in the vicinity of the upper end has an outward component and a downward tangent vector in the vicinity of the lower end has an outward component”. .
By providing the connection member 13 having such a shape, the tubular cushioning member 12 fixed to the outer peripheral side is slightly between the strands of the coil spring 11 'as shown in FIG. It tends to bulge outward.
Thereby, when the spring contracts, the tubular cushioning member 12 tends to be bent outward, and therefore, the tubular cushioning member 12 is reduced from being caught between the strands.

  In the present embodiment, an arc shape is taken as an example of “a shape in which an upward tangent vector in the vicinity of the upper end has an outward component and a downward tangent vector in the vicinity of the lower end has an outward component”. However, the present invention is not limited to this. For example, the shape of the shape of "<", or the center part is a substantially flat surface and the surface is inclined outward near the upper end and lower end, and the upward tangent vector near the upper end has an outward component. However, any shape can be used as long as the downward tangent vector in the vicinity of the lower end is a shape having an outward component.

  In the present embodiment, the coil spring 11 'is formed as a round wire, but the present invention can be applied to any coil spring. The shape on the inner peripheral side of the connection member may be matched with the shape on the outer peripheral side of the coil spring.

  In the present embodiment, the connection member 13 is an example of a spiral member that is attached to the outer peripheral side over almost the entire length (excluding the end winding portion) of the coil spring 11 ′. The connecting member may be partially provided without being limited thereto. For example, the connection member may be provided intermittently on the outer peripheral side of the coil spring 11 ′.

  In the present embodiment, by using the connecting member 13, the coil spring 11 in a side view (ie, FIGS. 3 and 4) viewed from a direction perpendicular to the axial line with the spiral axis of the coil spring as the vertical direction. The shape on the outer peripheral side of the strand of 'is a shape in which the upward tangent vector in the vicinity of the upper end has an outward component, and the downward tangent vector in the vicinity of the lower end has an outward component. The shape of the coil spring itself is “the spiral axis of the coil spring is the vertical direction, and the shape on the outer peripheral side of the coil spring strand as viewed from the direction orthogonal to the axis is the upward direction near its upper end. The tangent vector may have an outward component, and the shape of the downward tangent vector near the lower end may have an outward component.

1. . . Anti-vibration spring 11. . . Coil spring 12. . . Tubular cushioning member 13. . . Connecting member

Claims (5)

A coil spring formed by spirally winding an element wire;
A tubular cushioning member formed into a tubular shape with a rubber material,
An anti-vibration spring in which the coil spring is inserted into the tubular buffer member, and an inner peripheral surface of the tubular buffer member and an outer peripheral surface of the coil spring are in close contact with each other.   The anti-vibration spring according to claim 1, wherein the tubular buffer member and the coil spring are fixed.   The spiral axis of the coil spring is defined as the vertical direction, and the shape of the outer peripheral side of the strand in a side view seen from the direction orthogonal to the axis is a component in which the upward tangent vector in the vicinity of the upper end is directed outward. The anti-vibration spring according to claim 1 or 2, wherein the anti-vibration spring has a shape in which a downward tangent vector in the vicinity of the lower end has an outward component. A component in which an upward tangent vector in the vicinity of the upper end of the shape of the outer periphery of the element wire in the side view as viewed from a direction perpendicular to the axis is a spiral axis of the coil spring. And a connecting member for forming a shape in which a downward tangent vector in the vicinity of the lower end has an outward component,
The anti-vibration spring according to claim 1 or 2, wherein the tubular shock-absorbing member and the coil spring are closely contacted or fixed via the connecting member.   A vibration damping device comprising the vibration-proof spring according to any one of claims 1 to 4.

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